Solar power bank



FIG. 1 is a perspective view of a solar power bank showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines throughout the drawing figures depict portions of the solar power bank that form no part of the claimed design. 

CLAIM The ornamental design for a solar power bank, as shown and described. 